Pixel per inch (ppi)
Number of pixels per inch. Used for screen sharpness and image print size; numerically the same scale as dpi.
What is a pixel per inch?
- Symbol
- ppi
- Quantity
- Digital Image Resolution
- Unit system
- US customary
- Definition
- Number of pixels per inch. Used for screen sharpness and image print size; numerically the same scale as dpi.
- Exact
- Yes, the value is exact by definition
- Source
- International yard and pound agreement (1959)
Common applications
Used for the pixel density of phone, tablet and monitor screens, and for the print size of digital photos.
Pixel per inch in other digital image resolution units
- 1 ppi ≈ 39.37007874 dot/mDot per meter
- 1 ppi ≈ 0.3937007874 dot/cmDot per centimeter
- 1 ppi ≈ 0.03937007874 dot/mmDot per millimeter
- 1 ppi = 1 dpiDot per inch
- 1 ppi ≈ 0.3937007874 px/cmPixel per inch to Pixel per centimeter converter
Pixel per inch quick reference
| Pixel per inch | Pixel per centimeter | Dot per centimeter | Dot per inch |
|---|---|---|---|
| 1 ppi | ≈ 0.3937007874 px/cm | ≈ 0.3937007874 dot/cm | = 1 dpi |
| 10 ppi | ≈ 3.937007874 px/cm | ≈ 3.937007874 dot/cm | = 10 dpi |
| 100 ppi | ≈ 39.37007874 px/cm | ≈ 39.37007874 dot/cm | = 100 dpi |
| 1000 ppi | ≈ 393.7007874 px/cm | ≈ 393.7007874 dot/cm | = 1000 dpi |
Where the pixel per inch fits
The next smaller digital image resolution unit is the dot per meter (dot/m). 1 ppi ≈ 39.37007874 dot/m, and 1 dot/m = 0.0254 ppi.
The next larger digital image resolution unit is the dot per centimeter (dot/cm). 1 ppi ≈ 0.3937007874 dot/cm, and 1 dot/cm = 2.54 ppi.
Frequently asked questions
- How many pixels per centimeter are in one pixel per inch?
- One pixel per inch ≈ 0.3937007874 px/cm (pixels per centimeter).
- How many dots per centimeter are in one pixel per inch?
- One pixel per inch ≈ 0.3937007874 dot/cm (dots per centimeter).
- How many dots per inch are in one pixel per inch?
- One pixel per inch = 1 dpi (dots per inch).